Codesigned Air Shroud With Acoustic Baffles for HDD Cooling
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Solution Overview
Problem
Information handling systems face challenges in cooling components effectively while protecting them from acoustic energy, as fans used for cooling produce noise frequencies that can decrease the processing speed of components like Hard Disk Drives (HDDs).
Innovation Solution
A codesigned shroud with acoustically absorbent material and baffles oriented perpendicular to airflow directions is used to absorb acoustic energy and balance airflow channels for targeted cooling, ensuring that components are not directly exposed to noise-producing fan frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If fans are used to cool components, then cooling effectiveness is improved, but acoustic energy is generated that decreases processing speed of components like HDDs
Solution Approach 1:
The shroud is divided into multiple channels (first channel, second channel, third channel) that segment the airflow paths. Each channel directs airflow to specific components, allowing cooling to be optimized for each component while isolating acoustic energy paths. The segmentation of airflow channels enables targeted cooling without exposing all components to fan-generated acoustic energy.
Solution Approach 2:
The shroud acts as an intermediary structure between the fans and the components. It introduces acoustic absorbent material within the shroud to absorb acoustic energy generated by fans before it reaches the components. This intermediary structure allows cooling airflow to pass through while filtering out harmful acoustic energy.
2Object-affected harmful factors
If acoustic absorbent material is added to the shroud, then acoustic energy absorption is improved, but device complexity increases
Solution Approach 1:
The acoustic absorbent material is integrated directly into the shroud structure, merging the acoustic absorption function with the existing airflow channel structure. The shroud and acoustic absorbent material form a unified component rather than separate additions, reducing overall system complexity while achieving acoustic energy absorption.
Solution Approach 2:
The shroud is designed to perform multiple functions simultaneously: directing airflow to cool components, absorbing acoustic energy, and protecting components from acoustic exposure. By combining cooling channel guidance and acoustic absorption in a single structure, the design avoids adding separate complex subsystems.
3Manufacturing precision
If multiple airflow channels are created for targeted cooling, then cooling precision is improved, but device complexity increases
Solution Approach 1:
The shroud is divided into multiple channels (first channel, second channel, third channel) that segment the airflow paths. Each channel directs airflow to specific components, allowing cooling to be optimized for each component while isolating acoustic energy paths. The segmentation of airflow channels enables targeted cooling without exposing all components to fan-generated acoustic energy.
Solution Approach 2:
The shroud is designed to perform multiple functions simultaneously: directing airflow to cool components, absorbing acoustic energy, and protecting components from acoustic exposure. By combining cooling channel guidance and acoustic absorption in a single structure, the design avoids adding separate complex subsystems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces acoustic energy impact on HDDs, allowing them to operate at higher processing speeds by balancing airflows and attenuating noise, thus improving overall system performance.
Implementation Method 1
A codesigned shroud may comprise a plurality of walls defining a plurality of channels, wherein at least two walls of the plurality of walls define each channel of the plurality of channels, wherein each channel is substantially aligned with a direction of an airflow of the plurality of airflows and a set of baffles in a noise attenuation channel of the plurality of channels, the set of baffles oriented substantially perpendicular to the direction of an airflow in the noise attenuation channel, wherein each baffle comprises acoustically absorbent material
Data Source
AI summary
Embodiments may be directed to a codesigned shroud for a chassis comprising a plurality of components and a plurality of fans generating a plurality of airflows to cool the plurality of components. The codesigned shroud may have a plurality of walls defining a plurality of channels, wherein at least two walls of the plurality of walls define each channel of the plurality of channels. Each channel may be aligned with a direction of an airflow of the plurality of airflows. At least one channel includes a set of baffles oriented substantially perpendicular to the direction of an airflow in the channel. Each baffle may be formed with acoustically absorbent material to absorb acoustic energy that could affect performance of a component, wherein a first baffle of the set of baffles is offset from a second baffle of the set of baffles.